172104327665 has 32 divisors (see below), whose sum is σ = 218732576256. Its totient is φ = 129727825920.

The previous prime is 172104327649. The next prime is 172104327697. The reversal of 172104327665 is 566723401271.

It is a happy number.

It is not a de Polignac number, because 172104327665 - 2⁴ = 172104327649 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9895457 + ... + 9912833.

It is an arithmetic number, because the mean of its divisors is an integer number (6835393008).

Almost surely, 2^172104327665 is an apocalyptic number.

It is an amenable number.

172104327665 is a deficient number, since it is larger than the sum of its proper divisors (46628248591).

172104327665 is a wasteful number, since it uses less digits than its factorization.

172104327665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18689.

The product of its (nonzero) digits is 423360, while the sum is 44.

The spelling of 172104327665 in words is "one hundred seventy-two billion, one hundred four million, three hundred twenty-seven thousand, six hundred sixty-five".